/src/capstonev5/cs.c

Source
/* Capstone Disassembly Engine */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2019 */
#if defined (WIN32) || defined (WIN64) || defined (_WIN32) || defined (_WIN64)
#pragma warning(disable:4996)     // disable MSVC's warning on strcpy()
#pragma warning(disable:28719)    // disable MSVC's warning on strcpy()
#endif
#if defined(CAPSTONE_HAS_OSXKERNEL)
#include <Availability.h>
#include <libkern/libkern.h>
#else
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#endif

#include <string.h>
#include <capstone/capstone.h>

#include "utils.h"
#include "MCRegisterInfo.h"

#if defined(_KERNEL_MODE)
#include "windows\winkernel_mm.h"
#endif

// Issue #681: Windows kernel does not support formatting float point
#if defined(_KERNEL_MODE) && !defined(CAPSTONE_DIET)
#if defined(CAPSTONE_HAS_ARM) || defined(CAPSTONE_HAS_ARM64) || defined(CAPSTONE_HAS_M68K)
#define CAPSTONE_STR_INTERNAL(x) #x
#define CAPSTONE_STR(x) CAPSTONE_STR_INTERNAL(x)
#define CAPSTONE_MSVC_WRANING_PREFIX __FILE__ "("CAPSTONE_STR(__LINE__)") : warning message : "

#pragma message(CAPSTONE_MSVC_WRANING_PREFIX "Windows driver does not support full features for selected architecture(s). Define CAPSTONE_DIET to compile Capstone with only supported features. See issue #681 for details.")

#undef CAPSTONE_MSVC_WRANING_PREFIX
#undef CAPSTONE_STR
#undef CAPSTONE_STR_INTERNAL
#endif
#endif  // defined(_KERNEL_MODE) && !defined(CAPSTONE_DIET)

#if !defined(CAPSTONE_HAS_OSXKERNEL) && !defined(CAPSTONE_DIET) && !defined(_KERNEL_MODE)
#define INSN_CACHE_SIZE 32
#else
// reduce stack variable size for kernel/firmware
#define INSN_CACHE_SIZE 8
#endif

// default SKIPDATA mnemonic
#ifndef CAPSTONE_DIET
#define SKIPDATA_MNEM ".byte"
#else // No printing is available in diet mode
#define SKIPDATA_MNEM NULL
#endif

#include "arch/AArch64/AArch64Module.h"
#include "arch/ARM/ARMModule.h"
#include "arch/EVM/EVMModule.h"
#include "arch/WASM/WASMModule.h"
#include "arch/M680X/M680XModule.h"
#include "arch/M68K/M68KModule.h"
#include "arch/Mips/MipsModule.h"
#include "arch/PowerPC/PPCModule.h"
#include "arch/Sparc/SparcModule.h"
#include "arch/SystemZ/SystemZModule.h"
#include "arch/TMS320C64x/TMS320C64xModule.h"
#include "arch/X86/X86Module.h"
#include "arch/XCore/XCoreModule.h"
#include "arch/RISCV/RISCVModule.h"
#include "arch/MOS65XX/MOS65XXModule.h"
#include "arch/BPF/BPFModule.h"
#include "arch/SH/SHModule.h"
#include "arch/TriCore/TriCoreModule.h"

static const struct {
  // constructor initialization
  cs_err (*arch_init)(cs_struct *);
  // support cs_option()
  cs_err (*arch_option)(cs_struct *, cs_opt_type, size_t value);
  // bitmask for finding disallowed modes for an arch:
  // to be called in cs_open()/cs_option()
  cs_mode arch_disallowed_mode_mask;
} arch_configs[MAX_ARCH] = {
#ifdef CAPSTONE_HAS_ARM
  {
    ARM_global_init,
    ARM_option,
    ~(CS_MODE_LITTLE_ENDIAN | CS_MODE_ARM | CS_MODE_V8 | CS_MODE_MCLASS
        | CS_MODE_THUMB | CS_MODE_BIG_ENDIAN)
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_ARM64
  {
    AArch64_global_init,
    AArch64_option,
    ~(CS_MODE_LITTLE_ENDIAN | CS_MODE_ARM | CS_MODE_BIG_ENDIAN),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_MIPS
  {
    Mips_global_init,
    Mips_option,
    ~(CS_MODE_LITTLE_ENDIAN | CS_MODE_32 | CS_MODE_64 | CS_MODE_MICRO
        | CS_MODE_MIPS32R6 | CS_MODE_BIG_ENDIAN | CS_MODE_MIPS2 | CS_MODE_MIPS3),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_X86
  {
    X86_global_init,
    X86_option,
    ~(CS_MODE_LITTLE_ENDIAN | CS_MODE_32 | CS_MODE_64 | CS_MODE_16),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_POWERPC
  {
    PPC_global_init,
    PPC_option,
    ~(CS_MODE_LITTLE_ENDIAN | CS_MODE_32 | CS_MODE_64 | CS_MODE_BIG_ENDIAN
        | CS_MODE_QPX | CS_MODE_PS),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_SPARC
  {
    Sparc_global_init,
    Sparc_option,
    ~(CS_MODE_BIG_ENDIAN | CS_MODE_V9),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_SYSZ
  {
    SystemZ_global_init,
    SystemZ_option,
    ~(CS_MODE_BIG_ENDIAN),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_XCORE
  {
    XCore_global_init,
    XCore_option,
    ~(CS_MODE_BIG_ENDIAN),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_M68K
  {
    M68K_global_init,
    M68K_option,
    ~(CS_MODE_BIG_ENDIAN | CS_MODE_M68K_000 | CS_MODE_M68K_010 | CS_MODE_M68K_020
        | CS_MODE_M68K_030 | CS_MODE_M68K_040 | CS_MODE_M68K_060),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_TMS320C64X
  {
    TMS320C64x_global_init,
    TMS320C64x_option,
    ~(CS_MODE_LITTLE_ENDIAN | CS_MODE_BIG_ENDIAN),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_M680X
  {
    M680X_global_init,
    M680X_option,
    ~(CS_MODE_M680X_6301 | CS_MODE_M680X_6309 | CS_MODE_M680X_6800
        | CS_MODE_M680X_6801 | CS_MODE_M680X_6805 | CS_MODE_M680X_6808
        | CS_MODE_M680X_6809 | CS_MODE_M680X_6811 | CS_MODE_M680X_CPU12
        | CS_MODE_M680X_HCS08),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_EVM
  {
    EVM_global_init,
    EVM_option,
    0,
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_MOS65XX
  {
    MOS65XX_global_init,
    MOS65XX_option,
    ~(CS_MODE_LITTLE_ENDIAN | CS_MODE_MOS65XX_6502 | CS_MODE_MOS65XX_65C02
        | CS_MODE_MOS65XX_W65C02 | CS_MODE_MOS65XX_65816_LONG_MX),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_WASM
  {
    WASM_global_init,
    WASM_option,
    0,
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_BPF
  {
    BPF_global_init,
    BPF_option,
    ~(CS_MODE_LITTLE_ENDIAN | CS_MODE_BPF_CLASSIC | CS_MODE_BPF_EXTENDED
        | CS_MODE_BIG_ENDIAN),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_RISCV
  {
    RISCV_global_init,
    RISCV_option,
    ~(CS_MODE_RISCV32 | CS_MODE_RISCV64 | CS_MODE_RISCVC),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_SH
  {
    SH_global_init,
    SH_option,
    ~(CS_MODE_SH2 | CS_MODE_SH2A | CS_MODE_SH3 |
      CS_MODE_SH4 | CS_MODE_SH4A |
      CS_MODE_SHFPU | CS_MODE_SHDSP|CS_MODE_BIG_ENDIAN),
  },
#else
  { NULL, NULL, 0 },
#endif
#ifdef CAPSTONE_HAS_TRICORE
  {
    TRICORE_global_init,
    TRICORE_option,
    ~(CS_MODE_TRICORE_110 | CS_MODE_TRICORE_120 | CS_MODE_TRICORE_130
    | CS_MODE_TRICORE_131 | CS_MODE_TRICORE_160 | CS_MODE_TRICORE_161
    | CS_MODE_TRICORE_162 | CS_MODE_LITTLE_ENDIAN),
  },
#else
  { NULL, NULL, 0 },
#endif
};

// bitmask of enabled architectures
static const uint32_t all_arch = 0
#ifdef CAPSTONE_HAS_ARM
  | (1 << CS_ARCH_ARM)
#endif
#ifdef CAPSTONE_HAS_ARM64
  | (1 << CS_ARCH_ARM64)
#endif
#ifdef CAPSTONE_HAS_MIPS
  | (1 << CS_ARCH_MIPS)
#endif
#ifdef CAPSTONE_HAS_X86
  | (1 << CS_ARCH_X86)
#endif
#ifdef CAPSTONE_HAS_POWERPC
  | (1 << CS_ARCH_PPC)
#endif
#ifdef CAPSTONE_HAS_SPARC
  | (1 << CS_ARCH_SPARC)
#endif
#ifdef CAPSTONE_HAS_SYSZ
  | (1 << CS_ARCH_SYSZ)
#endif
#ifdef CAPSTONE_HAS_XCORE
  | (1 << CS_ARCH_XCORE)
#endif
#ifdef CAPSTONE_HAS_M68K
  | (1 << CS_ARCH_M68K)
#endif
#ifdef CAPSTONE_HAS_TMS320C64X
  | (1 << CS_ARCH_TMS320C64X)
#endif
#ifdef CAPSTONE_HAS_M680X
  | (1 << CS_ARCH_M680X)
#endif
#ifdef CAPSTONE_HAS_EVM
  | (1 << CS_ARCH_EVM)
#endif
#ifdef CAPSTONE_HAS_MOS65XX
  | (1 << CS_ARCH_MOS65XX)
#endif
#ifdef CAPSTONE_HAS_WASM
  | (1 << CS_ARCH_WASM)
#endif
#ifdef CAPSTONE_HAS_BPF
  | (1 << CS_ARCH_BPF)
#endif
#ifdef CAPSTONE_HAS_RISCV
  | (1 << CS_ARCH_RISCV)
#endif
#ifdef CAPSTONE_HAS_SH
  | (1 << CS_ARCH_SH)
#endif
#ifdef CAPSTONE_HAS_TRICORE
  | (1 << CS_ARCH_TRICORE)
#endif
;


#if defined(CAPSTONE_USE_SYS_DYN_MEM)
#if !defined(CAPSTONE_HAS_OSXKERNEL) && !defined(_KERNEL_MODE)
// default
cs_malloc_t cs_mem_malloc = malloc;
cs_calloc_t cs_mem_calloc = calloc;
cs_realloc_t cs_mem_realloc = realloc;
cs_free_t cs_mem_free = free;
#if defined(_WIN32_WCE)
cs_vsnprintf_t cs_vsnprintf = _vsnprintf;
#else
cs_vsnprintf_t cs_vsnprintf = vsnprintf;
#endif  // defined(_WIN32_WCE)

#elif defined(_KERNEL_MODE)
// Windows driver
cs_malloc_t cs_mem_malloc = cs_winkernel_malloc;
cs_calloc_t cs_mem_calloc = cs_winkernel_calloc;
cs_realloc_t cs_mem_realloc = cs_winkernel_realloc;
cs_free_t cs_mem_free = cs_winkernel_free;
cs_vsnprintf_t cs_vsnprintf = cs_winkernel_vsnprintf;
#else
// OSX kernel
extern void* kern_os_malloc(size_t size);
extern void kern_os_free(void* addr);
extern void* kern_os_realloc(void* addr, size_t nsize);

static void* cs_kern_os_calloc(size_t num, size_t size)
{
  size_t alloc = num * size;
  if (num && size != alloc / num) {
    return NULL; // overflow check
  }
  return kern_os_malloc(alloc); // malloc bzeroes the buffer
}

cs_malloc_t cs_mem_malloc = kern_os_malloc;
cs_calloc_t cs_mem_calloc = cs_kern_os_calloc;
cs_realloc_t cs_mem_realloc = kern_os_realloc;
cs_free_t cs_mem_free = kern_os_free;
cs_vsnprintf_t cs_vsnprintf = vsnprintf;
#endif  // !defined(CAPSTONE_HAS_OSXKERNEL) && !defined(_KERNEL_MODE)
#else
// User-defined
cs_malloc_t cs_mem_malloc = NULL;
cs_calloc_t cs_mem_calloc = NULL;
cs_realloc_t cs_mem_realloc = NULL;
cs_free_t cs_mem_free = NULL;
cs_vsnprintf_t cs_vsnprintf = NULL;

#endif  // defined(CAPSTONE_USE_SYS_DYN_MEM)

CAPSTONE_EXPORT
unsigned int CAPSTONE_API cs_version(int *major, int *minor)
{
  if (major != NULL && minor != NULL) {
    *major = CS_API_MAJOR;
    *minor = CS_API_MINOR;
  }

  return (CS_API_MAJOR << 8) + CS_API_MINOR;
}

CAPSTONE_EXPORT
bool CAPSTONE_API cs_support(int query)
{
  if (query == CS_ARCH_ALL)
    return all_arch == ((1 << CS_ARCH_ARM)   | (1 << CS_ARCH_ARM64)      |
            (1 << CS_ARCH_MIPS)  | (1 << CS_ARCH_X86)        |
            (1 << CS_ARCH_PPC)   | (1 << CS_ARCH_SPARC)      |
            (1 << CS_ARCH_SYSZ)  | (1 << CS_ARCH_XCORE)      |
            (1 << CS_ARCH_M68K)  | (1 << CS_ARCH_TMS320C64X) |
            (1 << CS_ARCH_M680X) | (1 << CS_ARCH_EVM)        |
            (1 << CS_ARCH_RISCV) | (1 << CS_ARCH_MOS65XX)    |
            (1 << CS_ARCH_WASM)  | (1 << CS_ARCH_BPF)        |
            (1 << CS_ARCH_SH)    | (1 << CS_ARCH_TRICORE));

  if ((unsigned int)query < CS_ARCH_MAX)
    return all_arch & (1 << query);

  if (query == CS_SUPPORT_DIET) {
#ifdef CAPSTONE_DIET
    return true;
#else
    return false;
#endif
  }

  if (query == CS_SUPPORT_X86_REDUCE) {
#if defined(CAPSTONE_HAS_X86) && defined(CAPSTONE_X86_REDUCE)
    return true;
#else
    return false;
#endif
  }

  // unsupported query
  return false;
}

CAPSTONE_EXPORT
cs_err CAPSTONE_API cs_errno(csh handle)
{
  struct cs_struct *ud;
  if (!handle)
    return CS_ERR_CSH;

  ud = (struct cs_struct *)(uintptr_t)handle;

  return ud->errnum;
}

CAPSTONE_EXPORT
const char * CAPSTONE_API cs_strerror(cs_err code)
{
  switch(code) {
    default:
      return "Unknown error code";
    case CS_ERR_OK:
      return "OK (CS_ERR_OK)";
    case CS_ERR_MEM:
      return "Out of memory (CS_ERR_MEM)";
    case CS_ERR_ARCH:
      return "Invalid/unsupported architecture(CS_ERR_ARCH)";
    case CS_ERR_HANDLE:
      return "Invalid handle (CS_ERR_HANDLE)";
    case CS_ERR_CSH:
      return "Invalid csh (CS_ERR_CSH)";
    case CS_ERR_MODE:
      return "Invalid mode (CS_ERR_MODE)";
    case CS_ERR_OPTION:
      return "Invalid option (CS_ERR_OPTION)";
    case CS_ERR_DETAIL:
      return "Details are unavailable (CS_ERR_DETAIL)";
    case CS_ERR_MEMSETUP:
      return "Dynamic memory management uninitialized (CS_ERR_MEMSETUP)";
    case CS_ERR_VERSION:
      return "Different API version between core & binding (CS_ERR_VERSION)";
    case CS_ERR_DIET:
      return "Information irrelevant in diet engine (CS_ERR_DIET)";
    case CS_ERR_SKIPDATA:
      return "Information irrelevant for 'data' instruction in SKIPDATA mode (CS_ERR_SKIPDATA)";
    case CS_ERR_X86_ATT:
      return "AT&T syntax is unavailable (CS_ERR_X86_ATT)";
    case CS_ERR_X86_INTEL:
      return "INTEL syntax is unavailable (CS_ERR_X86_INTEL)";
    case CS_ERR_X86_MASM:
      return "MASM syntax is unavailable (CS_ERR_X86_MASM)";
  }
}

CAPSTONE_EXPORT
cs_err CAPSTONE_API cs_open(cs_arch arch, cs_mode mode, csh *handle)
{
  cs_err err;
  struct cs_struct *ud;
  if (!cs_mem_malloc || !cs_mem_calloc || !cs_mem_realloc || !cs_mem_free || !cs_vsnprintf)
    // Error: before cs_open(), dynamic memory management must be initialized
    // with cs_option(CS_OPT_MEM)
    return CS_ERR_MEMSETUP;

  if (arch < CS_ARCH_MAX && arch_configs[arch].arch_init) {
    // verify if requested mode is valid
    if (mode & arch_configs[arch].arch_disallowed_mode_mask) {
      *handle = 0;
      return CS_ERR_MODE;
    }

    ud = cs_mem_calloc(1, sizeof(*ud));
    if (!ud) {
      // memory insufficient
      return CS_ERR_MEM;
    }

    ud->errnum = CS_ERR_OK;
    ud->arch = arch;
    ud->mode = mode;
    // by default, do not break instruction into details
    ud->detail = CS_OPT_OFF;

    // default skipdata setup
    ud->skipdata_setup.mnemonic = SKIPDATA_MNEM;

    err = arch_configs[ud->arch].arch_init(ud);
    if (err) {
      cs_mem_free(ud);
      *handle = 0;
      return err;
    }

    *handle = (uintptr_t)ud;

    return CS_ERR_OK;
  } else {
    *handle = 0;
    return CS_ERR_ARCH;
  }
}

CAPSTONE_EXPORT
cs_err CAPSTONE_API cs_close(csh *handle)
{
  struct cs_struct *ud;
  struct insn_mnem *next, *tmp;

  if (*handle == 0)
    // invalid handle
    return CS_ERR_CSH;

  ud = (struct cs_struct *)(*handle);

  if (ud->printer_info)
    cs_mem_free(ud->printer_info);

  // free the linked list of customized mnemonic
  tmp = ud->mnem_list;
  while(tmp) {
    next = tmp->next;
    cs_mem_free(tmp);
    tmp = next;
  }

  cs_mem_free(ud->insn_cache);
  cs_mem_free(ud->x86_insn_lut);
  cs_mem_free(ud->x86_insn_reg_lut);

  memset(ud, 0, sizeof(*ud));
  cs_mem_free(ud);

  // invalidate this handle by ZERO out its value.
  // this is to make sure it is unusable after cs_close()
  *handle = 0;

  return CS_ERR_OK;
}

// replace str1 in target with str2; target starts with str1
// output is put into result (which is array of char with size CS_MNEMONIC_SIZE)
// return 0 on success, -1 on failure
static int str_replace(char *result, char *target, const char *str1, char *str2)
{
  // only perform replacement if the output fits into result
  if (strlen(target) - strlen(str1) + strlen(str2) < CS_MNEMONIC_SIZE - 1)  {
    // copy str2 to begining of result
    strcpy(result, str2);
    // skip str1 - already replaced by str2
    strcat(result, target + strlen(str1));

    return 0;
  } else
    return -1;
}

// fill insn with mnemonic & operands info
static void fill_insn(struct cs_struct *handle, cs_insn *insn, char *buffer, MCInst *mci,
    PostPrinter_t postprinter, const uint8_t *code)
{
#ifndef CAPSTONE_DIET
  char *sp, *mnem;
#endif
  uint16_t copy_size = MIN(sizeof(insn->bytes), insn->size);

  // fill the instruction bytes.
  // we might skip some redundant bytes in front in the case of X86
  memcpy(insn->bytes, code + insn->size - copy_size, copy_size);
  insn->op_str[0] = '\0';
  // mnemonic is filled below, after the post printer runs: post printers
  // must derive any checks from insn_asm, never from insn->mnemonic
  insn->mnemonic[0] = '\0';
  insn->size = copy_size;

  // alias instruction might have ID saved in OpcodePub
  if (MCInst_getOpcodePub(mci))
    insn->id = MCInst_getOpcodePub(mci);

  // post printer handles some corner cases (hacky)
  if (postprinter)
    postprinter((csh)handle, insn, buffer, mci);

#ifndef CAPSTONE_DIET
  mnem = insn->mnemonic;
  // memset(mnem, 0, CS_MNEMONIC_SIZE);
  for (sp = buffer; *sp; sp++) {
    if (*sp == ' '|| *sp == '\t')
      break;
    if (*sp == '|')  // lock|rep prefix for x86
      *sp = ' ';
    // copy to @mnemonic
    *mnem = *sp;
    mnem++;
  }

  *mnem = '\0';

  // we might have customized mnemonic
  if (handle->mnem_list) {
    struct insn_mnem *tmp = handle->mnem_list;
    while(tmp) {
      if (tmp->insn.id == insn->id) {
        char str[CS_MNEMONIC_SIZE];

        if (!str_replace(str, insn->mnemonic, cs_insn_name((csh)handle, insn->id), tmp->insn.mnemonic)) {
          // copy result to mnemonic
          (void)strncpy(insn->mnemonic, str, sizeof(insn->mnemonic) - 1);
          insn->mnemonic[sizeof(insn->mnemonic) - 1] = '\0';
        }

        break;
      }
      tmp = tmp->next;
    }
  }

  // copy @op_str
  if (*sp) {
    // find the next non-space char
    sp++;
    for (; ((*sp == ' ') || (*sp == '\t')); sp++);
    strncpy(insn->op_str, sp, sizeof(insn->op_str) - 1);
    insn->op_str[sizeof(insn->op_str) - 1] = '\0';
  } else
    insn->op_str[0] = '\0';

#endif
}

// how many bytes will we skip when encountering data (CS_OPT_SKIPDATA)?
// this very much depends on instruction alignment requirement of each arch.
static uint8_t skipdata_size(cs_struct *handle)
{
  switch(handle->arch) {
    default:
      // should never reach
      return (uint8_t)-1;
    case CS_ARCH_ARM:
      // skip 2 bytes on Thumb mode.
      if (handle->mode & CS_MODE_THUMB)
        return 2;
      // otherwise, skip 4 bytes
      return 4;
    case CS_ARCH_ARM64:
    case CS_ARCH_MIPS:
    case CS_ARCH_PPC:
    case CS_ARCH_SPARC:
      // skip 4 bytes
      return 4;
    case CS_ARCH_SYSZ:
      // SystemZ instruction's length can be 2, 4 or 6 bytes,
      // so we just skip 2 bytes
      return 2;
    case CS_ARCH_X86:
      // X86 has no restriction on instruction alignment
      return 1;
    case CS_ARCH_XCORE:
      // XCore instruction's length can be 2 or 4 bytes,
      // so we just skip 2 bytes
      return 2;
    case CS_ARCH_M68K:
      // M68K has 2 bytes instruction alignment but contain multibyte instruction so we skip 2 bytes
      return 2;
    case CS_ARCH_TMS320C64X:
      // TMS320C64x alignment is 4.
      return 4;
    case CS_ARCH_M680X:
      // M680X alignment is 1.
      return 1;
    case CS_ARCH_EVM:
      // EVM alignment is 1.
      return 1;
    case CS_ARCH_WASM:
      //WASM alignment is 1
      return 1;
    case CS_ARCH_MOS65XX:
      // MOS65XX alignment is 1.
      return 1;
    case CS_ARCH_BPF:
      // both classic and extended BPF have alignment 8.
      return 8;
    case CS_ARCH_RISCV:
      // special compress mode
      if (handle->mode & CS_MODE_RISCVC)
        return 2;
      return 4;
    case CS_ARCH_SH:
      return 2;
    case CS_ARCH_TRICORE:
      // TriCore instruction's length can be 2 or 4 bytes,
      // so we just skip 2 bytes
      return 2;
  }
}

CAPSTONE_EXPORT
cs_err CAPSTONE_API cs_option(csh ud, cs_opt_type type, size_t value)
{
  struct cs_struct *handle;
  cs_opt_mnem *opt;

  // cs_option() can be called with NULL handle just for CS_OPT_MEM
  // This is supposed to be executed before all other APIs (even cs_open())
  if (type == CS_OPT_MEM) {
    cs_opt_mem *mem = (cs_opt_mem *)value;

    cs_mem_malloc = mem->malloc;
    cs_mem_calloc = mem->calloc;
    cs_mem_realloc = mem->realloc;
    cs_mem_free = mem->free;
    cs_vsnprintf = mem->vsnprintf;

    return CS_ERR_OK;
  }

  handle = (struct cs_struct *)(uintptr_t)ud;
  if (!handle)
    return CS_ERR_CSH;

  switch(type) {
    default:
      break;

    case CS_OPT_UNSIGNED:
      handle->imm_unsigned = (cs_opt_value)value;
      return CS_ERR_OK;

    case CS_OPT_DETAIL:
      handle->detail = (cs_opt_value)value;
      return CS_ERR_OK;

    case CS_OPT_SKIPDATA:
      handle->skipdata = (value == CS_OPT_ON);
      if (handle->skipdata) {
        if (handle->skipdata_size == 0) {
          // set the default skipdata size
          handle->skipdata_size = skipdata_size(handle);
        }
      }
      return CS_ERR_OK;

    case CS_OPT_SKIPDATA_SETUP:
      if (value) {
        handle->skipdata_setup = *((cs_opt_skipdata *)value);
        if (handle->skipdata_setup.mnemonic == NULL) {
          handle->skipdata_setup.mnemonic = SKIPDATA_MNEM;
        }
      }
      return CS_ERR_OK;

    case CS_OPT_MNEMONIC:
      opt = (cs_opt_mnem *)value;
      if (opt->id) {
        if (opt->mnemonic) {
          struct insn_mnem *tmp;

          // add new instruction, or replace existing instruction
          // 1. find if we already had this insn in the linked list
          tmp = handle->mnem_list;
          while(tmp) {
            if (tmp->insn.id == opt->id) {
              // found this instruction, so replace its mnemonic
              (void)strncpy(tmp->insn.mnemonic, opt->mnemonic, sizeof(tmp->insn.mnemonic) - 1);
              tmp->insn.mnemonic[sizeof(tmp->insn.mnemonic) - 1] = '\0';
              break;
            }
            tmp = tmp->next;
          }

          // 2. add this instruction if we have not had it yet
          if (!tmp) {
            tmp = cs_mem_malloc(sizeof(*tmp));
            if (!tmp) {
              return CS_ERR_MEM;
            }
            tmp->insn.id = opt->id;
            (void)strncpy(tmp->insn.mnemonic, opt->mnemonic, sizeof(tmp->insn.mnemonic) - 1);
            tmp->insn.mnemonic[sizeof(tmp->insn.mnemonic) - 1] = '\0';
            // this new instruction is heading the list
            tmp->next = handle->mnem_list;
            handle->mnem_list = tmp;
          }
          return CS_ERR_OK;
        } else {
          struct insn_mnem *prev, *tmp;

          // we want to delete an existing instruction
          // iterate the list to find the instruction to remove it
          tmp = handle->mnem_list;
          prev = tmp;
          while(tmp) {
            if (tmp->insn.id == opt->id) {
              // delete this instruction
              if (tmp == prev) {
                // head of the list
                handle->mnem_list = tmp->next;
              } else {
                prev->next = tmp->next;
              }
              cs_mem_free(tmp);
              break;
            }
            prev = tmp;
            tmp = tmp->next;
          }
        }
      }
      return CS_ERR_OK;

    case CS_OPT_MODE:
      // verify if requested mode is valid
      if (value & arch_configs[handle->arch].arch_disallowed_mode_mask) {
        return CS_ERR_OPTION;
      }
      break;
  }

  return arch_configs[handle->arch].arch_option(handle, type, value);
}

// generate @op_str for data instruction of SKIPDATA
#ifndef CAPSTONE_DIET
static void skipdata_opstr(char *opstr, const uint8_t *buffer, size_t size)
{
  char *p = opstr;
  int len;
  size_t i;
  size_t available = sizeof(((cs_insn*)NULL)->op_str);

  if (!size) {
    opstr[0] = '\0';
    return;
  }

  len = cs_snprintf(p, available, "0x%02x", buffer[0]);
  if (len < 0 || (size_t)len > available - 1) {
    opstr[0] = '\0';
    return;
  }
  p+= len;
  available -= len;

  for(i = 1; i < size; i++) {
    len = cs_snprintf(p, available, ", 0x%02x", buffer[i]);
    if (len < 0) {
      break;
    }
    if ((size_t)len > available - 1) {
      break;
    }
    p+= len;
    available -= len;
  }
}
#endif

// dynamicly allocate memory to contain disasm insn
// NOTE: caller must free() the allocated memory itself to avoid memory leaking
CAPSTONE_EXPORT
size_t CAPSTONE_API cs_disasm(csh ud, const uint8_t *buffer, size_t size, uint64_t offset, size_t count, cs_insn **insn)
{
  struct cs_struct *handle;
  MCInst mci;
  uint16_t insn_size;
  size_t c = 0, i;
  unsigned int f = 0; // index of the next instruction in the cache
  cs_insn *insn_cache;  // cache contains disassembled instructions
  void *total = NULL;
  size_t total_size = 0;  // total size of output buffer containing all insns
  bool r;
  void *tmp;
  size_t skipdata_bytes;
  uint64_t offset_org; // save all the original info of the buffer
  size_t size_org;
  const uint8_t *buffer_org;
  unsigned int cache_size = INSN_CACHE_SIZE;
  size_t next_offset;

  handle = (struct cs_struct *)(uintptr_t)ud;
  if (!handle) {
    // FIXME: how to handle this case:
    // handle->errnum = CS_ERR_HANDLE;
    return 0;
  }

  handle->errnum = CS_ERR_OK;

  // reset IT block of ARM structure
  if (handle->arch == CS_ARCH_ARM)
    handle->ITBlock.size = 0;

#ifdef CAPSTONE_USE_SYS_DYN_MEM
  if (count > 0 && count <= INSN_CACHE_SIZE)
    cache_size = (unsigned int) count;
#endif

  // save the original offset for SKIPDATA
  buffer_org = buffer;
  offset_org = offset;
  size_org = size;

  total_size = sizeof(cs_insn) * cache_size;
  total = cs_mem_calloc(sizeof(cs_insn), cache_size);
  if (total == NULL) {
    // insufficient memory
    handle->errnum = CS_ERR_MEM;
    return 0;
  }

  insn_cache = total;

  while (size > 0) {
    MCInst_Init(&mci);
    mci.csh = handle;

    // relative branches need to know the address & size of current insn
    mci.address = offset;

    if (handle->detail) {
      // allocate memory for @detail pointer
      insn_cache->detail = cs_mem_malloc(sizeof(cs_detail));
      if (insn_cache->detail == NULL) {
        // insufficient memory
        handle->errnum = CS_ERR_MEM;
        break;
      }
    } else {
      insn_cache->detail = NULL;
    }

    // save all the information for non-detailed mode
    mci.flat_insn = insn_cache;
    mci.flat_insn->address = offset;
#ifdef CAPSTONE_DIET
    // zero out mnemonic & op_str
    mci.flat_insn->mnemonic[0] = '\0';
    mci.flat_insn->op_str[0] = '\0';
#endif

    r = handle->disasm(ud, buffer, size, &mci, &insn_size, offset, handle->getinsn_info);
    if (r) {
      SStream ss;
      SStream_Init(&ss);

      mci.flat_insn->size = insn_size;

      // map internal instruction opcode to public insn ID

      handle->insn_id(handle, insn_cache, mci.Opcode);

      handle->printer(&mci, &ss, handle->printer_info);
      fill_insn(handle, insn_cache, ss.buffer, &mci, handle->post_printer, buffer);

      // adjust for pseudo opcode (X86)
      if (handle->arch == CS_ARCH_X86 && insn_cache->id != X86_INS_VCMP)
        insn_cache->id += mci.popcode_adjust;

      next_offset = insn_size;
    } else {
      // encounter a broken instruction

      // free memory of @detail pointer
      if (handle->detail) {
        cs_mem_free(insn_cache->detail);
      }

      // if there is no request to skip data, or remaining data is too small,
      // then bail out
      if (!handle->skipdata || handle->skipdata_size > size)
        break;

      if (handle->skipdata_setup.callback) {
        skipdata_bytes = handle->skipdata_setup.callback(buffer_org, size_org,
            (size_t)(offset - offset_org), handle->skipdata_setup.user_data);
        if (skipdata_bytes > size)
          // remaining data is not enough
          break;

        if (!skipdata_bytes)
          // user requested not to skip data, so bail out
          break;
      } else
        skipdata_bytes = handle->skipdata_size;

      // we have to skip some amount of data, depending on arch & mode
      // invalid ID for this "data" instruction
      insn_cache->id = 0;
      insn_cache->address = offset;
      insn_cache->size = (uint16_t)MIN(
        skipdata_bytes, sizeof(insn_cache->bytes));
      memcpy(insn_cache->bytes, buffer,
             MIN(skipdata_bytes, sizeof(insn_cache->bytes)));
#ifdef CAPSTONE_DIET
      insn_cache->mnemonic[0] = '\0';
      insn_cache->op_str[0] = '\0';
#else
      strncpy(insn_cache->mnemonic, handle->skipdata_setup.mnemonic,
          sizeof(insn_cache->mnemonic) - 1);
      skipdata_opstr(insn_cache->op_str, buffer, skipdata_bytes);
#endif
      insn_cache->detail = NULL;

      next_offset = skipdata_bytes;
    }

    // one more instruction entering the cache
    f++;

    // one more instruction disassembled
    c++;
    if (count > 0 && c == count)
      // already got requested number of instructions
      break;

    if (f == cache_size) {
      // full cache, so expand the cache to contain incoming insns
      cache_size = cache_size * 8 / 5; // * 1.6 ~ golden ratio
      total_size += (sizeof(cs_insn) * cache_size);
      tmp = cs_mem_realloc(total, total_size);
      if (tmp == NULL) { // insufficient memory
        if (handle->detail) {
          insn_cache = (cs_insn *)total;
          for (i = 0; i < c; i++, insn_cache++)
            cs_mem_free(insn_cache->detail);
        }

        cs_mem_free(total);
        *insn = NULL;
        handle->errnum = CS_ERR_MEM;
        return 0;
      }

      total = tmp;
      // continue to fill in the cache after the last instruction
      insn_cache = (cs_insn *)((char *)total + sizeof(cs_insn) * c);

      // reset f back to 0, so we fill in the cache from begining
      f = 0;
    } else
      insn_cache++;

    buffer += next_offset;
    size -= next_offset;
    offset += next_offset;
  }

  if (!c) {
    // we did not disassemble any instruction
    cs_mem_free(total);
    total = NULL;
  } else if (f != cache_size) {
    // total did not fully use the last cache, so downsize it
    tmp = cs_mem_realloc(total, total_size - (cache_size - f) * sizeof(*insn_cache));
    if (tmp == NULL) { // insufficient memory
      // free all detail pointers
      if (handle->detail) {
        insn_cache = (cs_insn *)total;
        for (i = 0; i < c; i++, insn_cache++)
          cs_mem_free(insn_cache->detail);
      }

      cs_mem_free(total);
      *insn = NULL;

      handle->errnum = CS_ERR_MEM;
      return 0;
    }

    total = tmp;
  }

  *insn = total;

  return c;
}

CAPSTONE_EXPORT
void CAPSTONE_API cs_free(cs_insn *insn, size_t count)
{
  size_t i;

  // free all detail pointers
  for (i = 0; i < count; i++)
    cs_mem_free(insn[i].detail);

  // then free pointer to cs_insn array
  cs_mem_free(insn);
}

CAPSTONE_EXPORT
cs_insn * CAPSTONE_API cs_malloc(csh ud)
{
  cs_insn *insn;
  struct cs_struct *handle = (struct cs_struct *)(uintptr_t)ud;

  insn = cs_mem_malloc(sizeof(cs_insn));
  if (!insn) {
    // insufficient memory
    handle->errnum = CS_ERR_MEM;
    return NULL;
  } else {
    if (handle->detail) {
      // allocate memory for @detail pointer
      insn->detail = cs_mem_malloc(sizeof(cs_detail));
      if (insn->detail == NULL) { // insufficient memory
        cs_mem_free(insn);
        handle->errnum = CS_ERR_MEM;
        return NULL;
      }
    } else
      insn->detail = NULL;
  }

  return insn;
}

// iterator for instruction "single-stepping"
CAPSTONE_EXPORT
bool CAPSTONE_API cs_disasm_iter(csh ud, const uint8_t **code, size_t *size,
    uint64_t *address, cs_insn *insn)
{
  if (*size == 0)
    return false;

  struct cs_struct *handle;
  uint16_t insn_size;
  MCInst mci;
  bool r;

  handle = (struct cs_struct *)(uintptr_t)ud;
  if (!handle) {
    return false;
  }

  handle->errnum = CS_ERR_OK;

  MCInst_Init(&mci);
  mci.csh = handle;

  // relative branches need to know the address & size of current insn
  mci.address = *address;

  // save all the information for non-detailed mode
  mci.flat_insn = insn;
  mci.flat_insn->address = *address;
#ifdef CAPSTONE_DIET
  // zero out mnemonic & op_str
  mci.flat_insn->mnemonic[0] = '\0';
  mci.flat_insn->op_str[0] = '\0';
#endif

  r = handle->disasm(ud, *code, *size, &mci, &insn_size, *address, handle->getinsn_info);
  if (r) {
    SStream ss;
    SStream_Init(&ss);

    mci.flat_insn->size = insn_size;

    // map internal instruction opcode to public insn ID
    handle->insn_id(handle, insn, mci.Opcode);

    handle->printer(&mci, &ss, handle->printer_info);

    fill_insn(handle, insn, ss.buffer, &mci, handle->post_printer, *code);

    // adjust for pseudo opcode (X86)
    if (handle->arch == CS_ARCH_X86)
      insn->id += mci.popcode_adjust;

    *code += insn_size;
    *size -= insn_size;
    *address += insn_size;
  } else {   // encounter a broken instruction
    size_t skipdata_bytes;

    // if there is no request to skip data, or remaining data is too small,
    // then bail out
    if (!handle->skipdata || handle->skipdata_size > *size)
      return false;

    if (handle->skipdata_setup.callback) {
      skipdata_bytes = handle->skipdata_setup.callback(*code, *size,
          0, handle->skipdata_setup.user_data);
      if (skipdata_bytes > *size)
        // remaining data is not enough
        return false;

      if (!skipdata_bytes)
        // user requested not to skip data, so bail out
        return false;
    } else
      skipdata_bytes = handle->skipdata_size;

    // we have to skip some amount of data, depending on arch & mode
    insn->id = 0; // invalid ID for this "data" instruction
    insn->address = *address;
    insn->size = (uint16_t)MIN(skipdata_bytes, sizeof(insn->bytes));
    memcpy(insn->bytes, *code,
           MIN(skipdata_bytes, sizeof(insn->bytes)));
#ifdef CAPSTONE_DIET
    insn->mnemonic[0] = '\0';
    insn->op_str[0] = '\0';
#else
    strncpy(insn->mnemonic, handle->skipdata_setup.mnemonic,
        sizeof(insn->mnemonic) - 1);
    skipdata_opstr(insn->op_str, *code, skipdata_bytes);
#endif

    *code += skipdata_bytes;
    *size -= skipdata_bytes;
    *address += skipdata_bytes;
  }

  return true;
}

// return friendly name of register in a string
CAPSTONE_EXPORT
const char * CAPSTONE_API cs_reg_name(csh ud, unsigned int reg)
{
  struct cs_struct *handle = (struct cs_struct *)(uintptr_t)ud;

  if (!handle || handle->reg_name == NULL) {
    return NULL;
  }

  return handle->reg_name(ud, reg);
}

CAPSTONE_EXPORT
const char * CAPSTONE_API cs_insn_name(csh ud, unsigned int insn)
{
  struct cs_struct *handle = (struct cs_struct *)(uintptr_t)ud;

  if (!handle || handle->insn_name == NULL) {
    return NULL;
  }

  return handle->insn_name(ud, insn);
}

CAPSTONE_EXPORT
const char * CAPSTONE_API cs_group_name(csh ud, unsigned int group)
{
  struct cs_struct *handle = (struct cs_struct *)(uintptr_t)ud;

  if (!handle || handle->group_name == NULL) {
    return NULL;
  }

  return handle->group_name(ud, group);
}

CAPSTONE_EXPORT
bool CAPSTONE_API cs_insn_group(csh ud, const cs_insn *insn, unsigned int group_id)
{
  struct cs_struct *handle;
  if (!ud)
    return false;

  handle = (struct cs_struct *)(uintptr_t)ud;

  if (!handle->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return false;
  }

  if (!insn->id) {
    handle->errnum = CS_ERR_SKIPDATA;
    return false;
  }

  if (!insn->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return false;
  }

  return arr_exist8(insn->detail->groups, insn->detail->groups_count, group_id);
}

CAPSTONE_EXPORT
bool CAPSTONE_API cs_reg_read(csh ud, const cs_insn *insn, unsigned int reg_id)
{
  struct cs_struct *handle;
  if (!ud)
    return false;

  handle = (struct cs_struct *)(uintptr_t)ud;

  if (!handle->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return false;
  }

  if (!insn->id) {
    handle->errnum = CS_ERR_SKIPDATA;
    return false;
  }

  if (!insn->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return false;
  }

  return arr_exist(insn->detail->regs_read, insn->detail->regs_read_count, reg_id);
}

CAPSTONE_EXPORT
bool CAPSTONE_API cs_reg_write(csh ud, const cs_insn *insn, unsigned int reg_id)
{
  struct cs_struct *handle;
  if (!ud)
    return false;

  handle = (struct cs_struct *)(uintptr_t)ud;

  if (!handle->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return false;
  }

  if (!insn->id) {
    handle->errnum = CS_ERR_SKIPDATA;
    return false;
  }

  if (!insn->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return false;
  }

  return arr_exist(insn->detail->regs_write, insn->detail->regs_write_count, reg_id);
}

CAPSTONE_EXPORT
int CAPSTONE_API cs_op_count(csh ud, const cs_insn *insn, unsigned int op_type)
{
  struct cs_struct *handle;
  unsigned int count = 0, i;
  if (!ud)
    return -1;

  handle = (struct cs_struct *)(uintptr_t)ud;

  if (!handle->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return -1;
  }

  if (!insn->id) {
    handle->errnum = CS_ERR_SKIPDATA;
    return -1;
  }

  if (!insn->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return -1;
  }

  handle->errnum = CS_ERR_OK;

  switch (handle->arch) {
    default:
      handle->errnum = CS_ERR_HANDLE;
      return -1;
    case CS_ARCH_ARM:
      for (i = 0; i < insn->detail->arm.op_count; i++)
        if (insn->detail->arm.operands[i].type == (arm_op_type)op_type)
          count++;
      break;
    case CS_ARCH_ARM64:
      for (i = 0; i < insn->detail->arm64.op_count; i++)
        if (insn->detail->arm64.operands[i].type == (arm64_op_type)op_type)
          count++;
      break;
    case CS_ARCH_X86:
      for (i = 0; i < insn->detail->x86.op_count; i++)
        if (insn->detail->x86.operands[i].type == (x86_op_type)op_type)
          count++;
      break;
    case CS_ARCH_MIPS:
      for (i = 0; i < insn->detail->mips.op_count; i++)
        if (insn->detail->mips.operands[i].type == (mips_op_type)op_type)
          count++;
      break;
    case CS_ARCH_PPC:
      for (i = 0; i < insn->detail->ppc.op_count; i++)
        if (insn->detail->ppc.operands[i].type == (ppc_op_type)op_type)
          count++;
      break;
    case CS_ARCH_SPARC:
      for (i = 0; i < insn->detail->sparc.op_count; i++)
        if (insn->detail->sparc.operands[i].type == (sparc_op_type)op_type)
          count++;
      break;
    case CS_ARCH_SYSZ:
      for (i = 0; i < insn->detail->sysz.op_count; i++)
        if (insn->detail->sysz.operands[i].type == (sysz_op_type)op_type)
          count++;
      break;
    case CS_ARCH_XCORE:
      for (i = 0; i < insn->detail->xcore.op_count; i++)
        if (insn->detail->xcore.operands[i].type == (xcore_op_type)op_type)
          count++;
      break;
    case CS_ARCH_M68K:
      for (i = 0; i < insn->detail->m68k.op_count; i++)
        if (insn->detail->m68k.operands[i].type == (m68k_op_type)op_type)
          count++;
      break;
    case CS_ARCH_TMS320C64X:
      for (i = 0; i < insn->detail->tms320c64x.op_count; i++)
        if (insn->detail->tms320c64x.operands[i].type == (tms320c64x_op_type)op_type)
          count++;
      break;
    case CS_ARCH_M680X:
      for (i = 0; i < insn->detail->m680x.op_count; i++)
        if (insn->detail->m680x.operands[i].type == (m680x_op_type)op_type)
          count++;
      break;
    case CS_ARCH_EVM:
      break;
    case CS_ARCH_MOS65XX:
      for (i = 0; i < insn->detail->mos65xx.op_count; i++)
        if (insn->detail->mos65xx.operands[i].type == (mos65xx_op_type)op_type)
          count++;
      break;
    case CS_ARCH_WASM:
      for (i = 0; i < insn->detail->wasm.op_count; i++)
        if (insn->detail->wasm.operands[i].type == (wasm_op_type)op_type)
          count++;
      break;
    case CS_ARCH_BPF:
      for (i = 0; i < insn->detail->bpf.op_count; i++)
        if (insn->detail->bpf.operands[i].type == (bpf_op_type)op_type)
          count++;
      break;
    case CS_ARCH_RISCV:
      for (i = 0; i < insn->detail->riscv.op_count; i++)
        if (insn->detail->riscv.operands[i].type == (riscv_op_type)op_type)
          count++;
      break;
    case CS_ARCH_TRICORE:
      for (i = 0; i < insn->detail->tricore.op_count; i++)
        if (insn->detail->tricore.operands[i].type == (tricore_op_type)op_type)
          count++;
      break;
  }

  return count;
}

CAPSTONE_EXPORT
int CAPSTONE_API cs_op_index(csh ud, const cs_insn *insn, unsigned int op_type,
    unsigned int post)
{
  struct cs_struct *handle;
  unsigned int count = 0, i;
  if (!ud)
    return -1;

  handle = (struct cs_struct *)(uintptr_t)ud;

  if (!handle->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return -1;
  }

  if (!insn->id) {
    handle->errnum = CS_ERR_SKIPDATA;
    return -1;
  }

  if (!insn->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return -1;
  }

  handle->errnum = CS_ERR_OK;

  switch (handle->arch) {
    default:
      handle->errnum = CS_ERR_HANDLE;
      return -1;
    case CS_ARCH_ARM:
      for (i = 0; i < insn->detail->arm.op_count; i++) {
        if (insn->detail->arm.operands[i].type == (arm_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_ARM64:
      for (i = 0; i < insn->detail->arm64.op_count; i++) {
        if (insn->detail->arm64.operands[i].type == (arm64_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_X86:
      for (i = 0; i < insn->detail->x86.op_count; i++) {
        if (insn->detail->x86.operands[i].type == (x86_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_MIPS:
      for (i = 0; i < insn->detail->mips.op_count; i++) {
        if (insn->detail->mips.operands[i].type == (mips_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_PPC:
      for (i = 0; i < insn->detail->ppc.op_count; i++) {
        if (insn->detail->ppc.operands[i].type == (ppc_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_SPARC:
      for (i = 0; i < insn->detail->sparc.op_count; i++) {
        if (insn->detail->sparc.operands[i].type == (sparc_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_SYSZ:
      for (i = 0; i < insn->detail->sysz.op_count; i++) {
        if (insn->detail->sysz.operands[i].type == (sysz_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_XCORE:
      for (i = 0; i < insn->detail->xcore.op_count; i++) {
        if (insn->detail->xcore.operands[i].type == (xcore_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_TRICORE:
      for (i = 0; i < insn->detail->tricore.op_count; i++) {
        if (insn->detail->tricore.operands[i].type == (tricore_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_M68K:
      for (i = 0; i < insn->detail->m68k.op_count; i++) {
        if (insn->detail->m68k.operands[i].type == (m68k_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_TMS320C64X:
      for (i = 0; i < insn->detail->tms320c64x.op_count; i++) {
        if (insn->detail->tms320c64x.operands[i].type == (tms320c64x_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_M680X:
      for (i = 0; i < insn->detail->m680x.op_count; i++) {
        if (insn->detail->m680x.operands[i].type == (m680x_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_EVM:
#if 0
      for (i = 0; i < insn->detail->evm.op_count; i++) {
        if (insn->detail->evm.operands[i].type == (evm_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
#endif
      break;
    case CS_ARCH_MOS65XX:
      for (i = 0; i < insn->detail->mos65xx.op_count; i++) {
        if (insn->detail->mos65xx.operands[i].type == (mos65xx_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_WASM:
      for (i = 0; i < insn->detail->wasm.op_count; i++) {
        if (insn->detail->wasm.operands[i].type == (wasm_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_BPF:
      for (i = 0; i < insn->detail->bpf.op_count; i++) {
        if (insn->detail->bpf.operands[i].type == (bpf_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_RISCV:
      for (i = 0; i < insn->detail->riscv.op_count; i++) {
        if (insn->detail->riscv.operands[i].type == (riscv_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
    case CS_ARCH_SH:
      for (i = 0; i < insn->detail->sh.op_count; i++) {
        if (insn->detail->sh.operands[i].type == (sh_op_type)op_type)
          count++;
        if (count == post)
          return i;
      }
      break;
  }

  return -1;
}

CAPSTONE_EXPORT
cs_err CAPSTONE_API cs_regs_access(csh ud, const cs_insn *insn,
    cs_regs regs_read, uint8_t *regs_read_count,
    cs_regs regs_write, uint8_t *regs_write_count)
{
  struct cs_struct *handle;

  if (!ud)
    return -1;

  handle = (struct cs_struct *)(uintptr_t)ud;

#ifdef CAPSTONE_DIET
  // This API does not work in DIET mode
  handle->errnum = CS_ERR_DIET;
  return CS_ERR_DIET;
#else
  if (!handle->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return CS_ERR_DETAIL;
  }

  if (!insn->id) {
    handle->errnum = CS_ERR_SKIPDATA;
    return CS_ERR_SKIPDATA;
  }

  if (!insn->detail) {
    handle->errnum = CS_ERR_DETAIL;
    return CS_ERR_DETAIL;
  }

  if (handle->reg_access) {
    handle->reg_access(insn, regs_read, regs_read_count, regs_write, regs_write_count);
  } else {
    // this arch is unsupported yet
    handle->errnum = CS_ERR_ARCH;
    return CS_ERR_ARCH;
  }

  return CS_ERR_OK;
#endif
}

Coverage Report

Created: 2026-09-03 07:09